【JavsScript】一个元素绑定多个事件

 1 <script>
 2 document.getElementById("a").addEventListener("click", function() {
 3     alert("1");
 4 });
 5 
 6 document.getElementById("a").addEventListener("click", function() {
 7     alert("2");
 8 });
 9 
10 document.getElementById("a").addEventListener("click", function() {
11     alert("3");
12 });
13 </script>